Help Please - Excel

Hi All,

I have come across something i'm not sure is possible.

I need to take an item and show on a graph, this item has 2 variables.

The graph should have on left axle: "Likelihood of happening" - Low, Possible and hIgh
and at the bottom "Extent of Impact - Low, Moderate and High

Example:

"Item" is me
The "likelihood" of it raining today is 5%
Im outside in my shorts so if it rains the "Extent of impact" on me is high

So i need the item to be placed in the precise spot on the graph and able to be changed dynamically.

I really hope this makes sense because it's making my head hurt. I have tried putting the data on to a scatter graph but not working.