Step 1 :Given that women's heights are normally distributed with a mean of 63.4 inches and a standard deviation of 2.4 inches.
Step 2 :The height requirement for a branch of the military is between 58 inches and 80 inches.
Step 3 :We need to convert these height requirements to z-scores. The z-score is calculated as \((X - \mu) / \sigma\), where X is the value, \(\mu\) is the mean, and \(\sigma\) is the standard deviation.
Step 4 :Calculating the z-scores for the lower and upper bounds gives us -2.25 and 6.92 respectively.
Step 5 :The percentage of women who meet the height requirement is the area under the standard normal curve between these z-scores.
Step 6 :Using the standard normal distribution table, we find that the percentage of women who meet the height requirement is 98.78%.
Step 7 :Final Answer: The percentage of women who meet the height requirement is \(\boxed{98.78\%}\).