Here is one way.
Create a partition of a copy of the view. I created a parameter so you can inject a different sales percentage if you want.
Show Min - compute pane down then across
index() = WINDOW_MIN(IF [RunningSum-TruncationNoTimebound]>([Sales Percentage]*TOTAL(SUM([Sum(Truncation Value Notimebound)]))) THEN index() END)
Uncheck show header on all other fields in rows/columns
Drag the parameter into the marks card
Edit the label
Float your sheet
Time_To_Sales.twbx 4.3 MB
Adam, This worked great for me. Thank you for the insight.