The accompanying data represent the total travel tax (in dollars) for a 3-day business trip in 8 randomly selected cities. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers.

68.37

78.57

70.23

84.05

79.17

85.81

100.15

98.13

(a) Determine a point estimate for the population mean travel tax.

A point estimate for the population mean travel tax is $____.