Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed, with a mean of 50,000 miles and a standard deviation of 12,000 miles. I need answer...

Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed, with a mean of 50,000 miles and a standard deviation of 12,000 miles.

I need answer for both questions

How many miles will be traveled by at least (equal to and more than) 72% of the trucks?

How should Toby’s Trucking Co. use these percentages and proportions to make decision for the company?