The correct answer is:
His height is 4.45 standard deviations above the mean.
Step-by-step explanation:
A z-score is defined as the number of standard deviations a data point is away from the mean.
Since his z-score is positive, this means his height is above the mean.
Since the z-score is 4.45, this is how many standard deviations away from the mean his height is.