6' 8" = 6 * 12 + 8 = 80 inches.
= 203 centimeters.
"HQ" is "height quotient," 100 + 15 * z-score of height. I've never heard of it before, myself, but I defined it by analogy with "IQ," which is:
100 + 15 * z-score of performance on analytic reasoning task.
I guess I'm just off in the clouds. Which is strange, since my HQ is only 122.
(And, yes, it was a set-up for this overly-elaborate and not-funny joke.)