What is median height of 72, 75, 78, 72, and 73?

The median height is the one in the middle when placed in numerical order. Which in this case, it is 73. (the bolded numbers are those that are being crossed out)

72, 72, 73, 75, 78
72, 72, 73, 75, 78
72, 72, 73, 75, 78

73 is the median height!

The answer is 73 because to find the median you line them up least to greatest which looks like this, 72, 72, 73, 75, 78 and as you can see 73 is the number in the middles hope this helps! :D 
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(72, 72,) 73,(75, 78)