Speakers look like Innovox but could be something else. Probably weren't torqued down adequately the first time and vibrated loose.
Lower speakers are probably easier to access with a Little Giant ladder straddling the stair steps onto the
stage.
Upper speakers you can probably get to from a ~30ft extension ladder parked on the
auditorium floor. Easy thing to do is ask the custodians/maintenance what they have.
Many school districts have some form of
scissor lift -- often getting ping-ponged around between different campuses. Worth investigating. If the
stage doesn't have an
orchestra pit, there's a good chance you can drive a lift on the
apron and access both speakers relatively easily from a lift on-stage. Preferably one with the push-out extension
platform.
As for aiming the speakers, I would start with the bottom speakers. Isolate those, then
play them and walk the space -- start with it tilted up and then tilt down until you have good coverage of the first row. Then for the upper
speaker, start with it tilted down and then tilt up until you have good coverage of the last row. Walk the space with everything on listening to music and confirm there are no unusual gaps in coverage anywhere before you take the ladder down. I would probably retorque all the bolts on all speakers while you're at it. If these two speakers rattled loose, the other ones might too in the near future.
I’ve previously gotten the people who initially designed/installed the AV
system in 2015 for a different service issue, I might be able to get them to tell me the intended positions.
Really -- this is the first phone
call I would make. Most of the AV installers I work with would fix this for free. When I was an integrator, if someone sent us a photo of one of our installs that looked like this, we would get it fixed ASAP at no charge. As a consultant, most of the integrators I work with would do the same. This isn't a "things deteriorate as they get older" issue nor is it something the end user damaged. This is purely on the original installer for not tightening those bolts adequately and it gravely affects the ability to use that space.