Is it an image on the dashboard? Is it a shape mark?
Please upload at least a screenshot but more helpful, a Tableau Packaged Workbook to replicate your scenario. There isn't much we can do without it.
I also need to see a workbook to understand the requirement. It doesn't have to be your actual data. Just an excel data set with some bogus data in it. Then describe what you need to see: "When I get <this set of data> I want to see <this image> displayed in <this location>, but if I get <that set of data> I want to see <that image> displayed in <that location>...," for example.
If you need help anonymizing your data, follow the video posted here:
To change the position of an image based on filtering.
The picture will have to be a mark on a graph.
when filtering the value of the Mark will change and so move the picture.
But as the guys above mention attaching a workbook or some screenshots will really help in understanding what you are trying to do and propose the best solution for the scenario.