If you mean export to spreadsheet then In Dataform 2.1.1 this was done via export to portfolios and it was reported that it didn't work in Moodle 2.4 (CONTRIB-4180; https://moodle.org/mod/forum/discuss.php?d=216886&parent=967192).
You should be able to work around this reasonably well by using the spreadsheet Insert > Link to External Data... (Open Office Calc; there should be something similar for Excel).
- Use the tabular view to display the desired entries in a table.
- Copy the html of the table into a file on your desktop.
- Open the spreadsheet and select Insert > Link to External Data...
- Select the html file with the table
- Select HTML_1
- Click OK
See illustration below (Calc).