In order to export your data from MapInfo to Google Earth, you will need to use Google Earth Connection Utility that comes packaged with MapInfo software. Once you open your files in MapInfo, go to Tools menu and select Tool Manager. Scroll down to Google Earth Connection Utility and check the box below Loaded. Click OK and from the Map menu select Google Earth Link > Export to Google Earth. After that, select a destination directory, type a file name and click OK. Also, you will have the possibility to open the file directly in Google Earth if you check the Send to Google Earth now box.
If you want to export only some specific points to Google Earth instead of the entire file, select them and from the Map menu select again Google Earth Link > Export to Google Earth. Check the box next to Export selected objects (KML), click OK, select a destination folder and a file name and press again OK.