Wouldn't 71" make him 5'11"? If so, I think that might eliminate a few more of those on the shorter end...
This is either slightly off-topic or slightly all-topics...
That conversion always gives me trouble. I have to get out paper and actually think (so hard that I usually just get more confused) to get those calculations right.
What I mean is... It's easy to calculate that 71" (in inches) is 5.91667' (in feet) but that's not how we talk about someone's height.
I found a page that will convert the 71" to 5'11" without having to think too much or do too much with the 12"=1'.
It looks like it will convert other things (metric-to-U.S. and the like) too, if you fool around with it.
http://www.metric-conversions.org/length/inches-to-feet.htm