A half-century ago, the mean height of women in a particular country in their 20s was

63.2

inches. Assume that the heights of today's women in their 20s are approximately normally distributed with a standard deviation of

1.94

inches. If the mean height today is the same as that of a half-century ago, what percentage of all samples of

24

of today's women in their 20s have mean heights of at least

64.09

inches?