Yes, it will open in higher version. If you created with extract then it will ask locate the extract file.
But my friend (10.5) couldn't open TWB file...
You can open a file created in lower version to higher version of Tableau.
Tableau Workbook File (TWB) is an XML document. It contains the information about your sheets, dashboards and stories. The TWB file references a data source file such as Excel or TDE, and when you save the TWB file, it is linked to the source.
The most important thing to remember about TWB files is that they don’t contain any data – if you want to share your workbook, therefore, you will need to send both the Tableau Workbook File and the data source file.