Answer
Bell-shaped distribution.
Work Step by Step
Most full-grown men would fall in the middle (the highest frequency in the middle), that is from 5ft 7in to 5ft 11in. As we move to the right ($\gt5ft~11in$) or to the left ($\lt5ft~7in$) the number of full-grown men decreases (the frequencies tail off to the left and right).
