Covering a what-if parameter based on slicer selection?

Hi there! If I have a series of what-if parameters and a slicer corresponding (in name) to each of these,then how can I "cover up" a certain what-if parameter based on this selection?

Example:

Below, if the slicer is selected as is, I would like the "SD Percent" what-if parameter to disappear. And when another option is selected on the slicer, the "SD Percent" parameter to re-appear.

Idea:

Perhaps this could be done by using a textbox to cover it up with conditional formatting. However, this means that even when this text box would be transparent, it wouldn't be possible to interact with the what-if parameter as the text box would be in front of it. So any ideas would be welcomed!