Answer:
Jerry ran a farther distance and not Henry.
Explanation:
We are given the following information in the question:
Jerry rain 
 miles and Henry ran 2.1 miles.
 miles and Henry ran 2.1 miles.
Henry claimed that he ran a farther distance.
This is a wrong claim because when we compare:
 
 and 2.1
 and 2.1

Hence, Jerry ran a farther distance and not Henry.
Henry may have made some mistake in plotting 
 and 2.1 on the number line.
 and 2.1 on the number line.