Elsa runs a large animal shelter. At Elsa's shelter, the length of stay for puppies has a mean of
74
days and a standard deviation of
7
days. The Cohen family adopted a puppy named Axel from the shelter. When Axel was adopted, he had been at the shelter for
55
days.
Find the
z
-score of Axel's length of stay at the shelter relative to the the lengths of stay for all the puppies at the shelter. Round your answer to two decimal places.