Any other approach to fill an area above a statistic line

[#1]

I was looking for how to fill in an area above a median line in Graph Builder. 

But found out that I can do it opposite way. 

By using 'Area' chart type to fill in an area below 'Median' and then change background color to be darker. 

Any other approach possible? 

[#2]

I like to right-click, customize, and add polygons: here is an example with the Distribution platform to show out-of-spec areas: