78" but then there are ANTHROPOMETRIC MEASUREMENTS. Google it.
Dude, aren't you in high school? You should probably keep your mouth shut and stay in your lane...
Working in the anthro office made me realize that it usually has very little to do with just how tall (or short) you are. The lengths of your body parts, sitting height, weight (too much or too little) etc. are what DQ people. Alot of times its hard to tell just by looking at someone.