Assuming that the material applied to this wall uses your fill as it's 3D Hatching, you'll need to view this wall in 3D and use the Design > Align Texture > Set Origin command. Then it all depends on how you created the fill, or more accurately, where it's origin is. It will need to be exactly at the right place (somehwere near the corner of the grout), to avoid modeling another element to set your origin to.
Don't use too tight an angle to look at the wall, or this command will struggle.
Cheers,
Link.