I can not see your questions. Copy and paste is fruitless here. However check:
http://davidmlane.com/hyperstat/z_table.html
Automobile repair costs continue to rise with the average cost now at $367 per repair (U.S. News & World Report website, January 5, 2015). Assume that the cost for an automobile repair is normally distributed with a standard deviation of $88. Answer the following questions about the cost of automobile repairs. Use Table 1 in Appendix B.
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