Hisatabeach,
Spliting into multiple row is not possible.
You have to display the record with multiple lines when the text is longer than the column width.
If you don't want to display without word wrap then follow the below steps.
- In Design view, click anywhere in the tablix data region to select it. Gray row handles appear on the outside border of the tablix data region.
- Click the row handle to select the row.
- In Properties window set CanGrow to False.