Imagine that researchers measured resting heart rates on a large number of U.S. adults (n=5000) and found the following statistics:

Percentile	Resting Heart Rate (beats per minute)
5	45
10	X
25	60
50	70
75	80
90	Y
95	95

If resting heart rate follows a normal distribution, what is the value of X above? Round to the nearest whole number.