With just coordinates, you need to import the points into the model. Try one of the many macros by doing a search in this forum for "macro points". Then, you will need to use some of the surfacing tools to fill in those points. The Fill Surface can utilize this if you have a well defined boundary with a sketch. If you have many points (thousands), then you need to use a plug-in for importing point clouds. SolidWorks has its own tool called ScanTo3D, which is part of SolidWorks Premium. There are other 3rd party tools as well.