Hi Tony
If you are rescaling the assets to be 210px wide, they should be a bit taller. They should be 210x350 px in that case. This is in order to allow for some tiles to be taller, if they e.g. have trees (like to one in your photo). The trees will overlap tiles in the row behind, creating a bit of a 3D effect. There are also exports of the tiles with no trees, and trees, bushes, etc. as seperate items if you prefer to set them up differently. Place the pivot point at the bottom middle of all tiles, and you'll be good to go!
I hope this helps, let me know if you have any other questions, or if you feel something should be added to the pack