100 people where sampled and their heights were recorded, it was discovered the mean height was 5 feet and 6.3 inches with a standard deviation of 3.75 inches. What is the probability of someone being shorter than 5 feet and 4.2 inches tall?

Hint: Normal distribution with mean=5 feet and 6.3 inches and standard deviation of 3.75. Please see lecture 5.3 example of hours people spend on cell phone.