Assuming your [Measure] Object has all the numeric value [DIM] has the values HireDate, Salary, Etc.
Create a Variable Measure as below.
= If([DIM] ="Change in") Then [MEASURE] +"%" ElseIf ([DIM] ="Current Salary") Then "$" +[MEASURE] ElseIf ([DIM] ="Increment Salary") Then "$" +[MEASURE] Else +[MEASURE]