See if it helps !
Basically you need to create a new excel sheet and blend with your original data-source with the common field
New excel should be like (add Latitude & Longitude )
EMEA = Europe except for Germany Latitude. Longitude
Germany = Germany
Americas = North America and South America
APAC = Asian pacific
Here's a method - use groups or sets.
I've attached a superstore example where I just grabbed a heap of states and labelled them top, middle and bottom, and then took two in the middle out and called them something else.
HTH 18.3 attached
287337.twbx 2.4 MB
If there's no Country in your dataset you might have to create a manual list of where you want the zones to be, or you could create custom polygons on the map as well.