mean = 69. sd = 2.8. % > 74. Find the z value to correspond to 74 in this scenario.

z = (x - mean)/sd

= (74 - 69)/2.8

= 5/2.8

= 1.79.

% corresponding to z = 1.79 = 0.4633.

This value is for the area of the graph between the mean (69) and the value of X (I used the table for Areas under the graph). To calculate the value for >74, 0.5 - 0.4633 = 0.0367. So 3.67% of men would fit the criteria of being 74" or taller. (I won't qualify for the group!)