Hello everyone. I am debating about the following question and I am stuck.

Is it possible for any of you explain how to proceed? - Thank you

The distribution of heights of a group of people isapproximately normal with an average of 66 inches and standard deviation of 2.5 inches.

1 - What percent of the adults have heights that arewithin 1 inch of the average?

2 - What percent of the adults are 70 inches tall, tothe nearest inch?