How do I find z value and p value?

The Square Wheel Tire Company has determined that their tires must average 36 inches in diameter in order to fit most car models.
A random sample of 100 tires revealed a mean of 36.4 inches.
Required:
Assuming that the population standard deviation is 2.1 inches, test at 5 percent level of significance if management has anything to worry about.
H0:		=	36
Ha:			36
Using the summarized data below, determine the following:
Sample Mean	36.4
Assume the population standard deviation is equal to:	2.1
Sample Size	100
z =	1.904761905
p-value:
Find the rejection point for = 0.05
Do you reject or not reject the null hypothesis?	Do not Reject	since p-value is	>	alpha level.