Sunny County is also concerned about its commercial property foreclosures. The County Commissioner asks you to do some analysis of the distribution of commercial property foreclosures based on data from many prior years. Historically, the number of commercial property foreclosures are normally distributed with a mean of 225 and a standard deviation of 25.

Question: Last year, Sunny County experienced unusually fewer commercial property foreclosures. Only 3.59 percent (so, proportion = 0.0359) of previous years had a lower prevalence of commercial foreclosures. How many commercial foreclosures did Sunny County have last year?

Additional Info.: I am looking for a mathematical answer with steps not using Excel