Final answer:
Henry's height increased by 36%, from 50 inches to 68 inches.
Step-by-step explanation:
The question asks for the percentage increase of Henry's height. We start by calculating the difference in height: 68 inches - 50 inches = 18 inches. Then, to find the percentage increase, we divide the increase by the original height and multiply by 100%
(18 inches / 50 inches) × 100% = 36%
Thus, the percentage increase in Henry's height is 36%, which corresponds to option (b).