As a high-school coach, I certainly appreciate that you take what you get in athletes. I'm just suggesting that with those strength numbers and those jump distances, more strength is not the thing for him to emphasize. My guess is that technique is where to work. If speed is really lacking with those squat numbers, then, seriously, they might want to think about throwing.
Where I'm from 6.80 gets you 2nd in conference but still leaves something to be desired. I have showed film of some of my guys to several higher level jumpers/coaches and the general response has been "that jump is only 6.80?". I've taken almost everyone I've coached from 6.00-6.40 to 6.70-7.00 but no further. I've had guys with great technique, not so good technique, good speed (10.73-6.95m), bad speed(11.54-7.01m)….can't get over the 23'0" hump.
Their strength #s are good because it's almost all we can do 75% of the year (cold weather state with no indoor facilities except good weight room). I would love to have the answer to all my problems if anyone has it 🙂