Selected Answer
You need just to get the value from the cell with the drop down box, bring it into the macro, check which value it is, and change the folder location based on that.
These two tutorials from us will show you how to do all of that:
Get Data from the Worksheet into a Macro in Excel
VBA IF Statement in Excel Macros
Update
Here is a sample:
Sub filesave()
'value from dropdown
dropValue = Range("A1").Value
ActiveWorkbook.SaveAs ("I:\BLM_Public\BloomsburgReports\DailySuperVisorReport2016\" & dropValue & Format(Now(), "DD-MMM-YYYY hh mm AMPM") & ".xlsm")
End Sub
Change A1 to the cell that contains the drop down.
Put dropValue anywhere in the saving file path. I just put it before the date part.