When designing a built environment, one criteria is to use a design that accommodates 98% of the population. Because men tend to be taller on average then women, we will
consider only men as we investigate the limitations of the standard doorway height. Given
that heights of American men are normally distributed with a mean of 69 inches and a
standard deviation is 2.8 in., what should be the minimum height of doorways to
accommodate 98% of American men without them bending or bumping their head. Round
your height to the nearest hundredth of an inch.