Crazy to me to try to break it down like that, as if an inch or two, here and there, makes a difference with no context.
We just need a good player. There are good players that are 6'9. There are good players that are 7'0. I suspect we aren't going to be able to find and pay a 7-footer that has the skills necessary to be successful in Moser's system.
Houston's best defensive big man was 6'8 (Tugler). In recent year's it's been the 6'8 Roberts.
Find guys that can play. No need to go chasing certain measurables. Period.