I use the project tool to project shapefiles that are in WGS to a state plane coordinate system. After running the tool my Z values remain in meters and after converting them to international feet they are still incorrect. They are around 200 feet lower than they should be. In the project tool the vertical checkbox is always disabled (greyed out), which I assume would fix my problem. I was wondering if anyone has had this issue before and knows of a method to obtain the correct Z values.