No. It shifts about ROFS-0.25V. So only if ROFS=1.55V, the shift will be 1.3V.
Just read the datasheet under "ANALOG OUTPUTS". I'm sorry if I did not describe this clearly, but the U+ voltage is fixed (only dependent on ROFS), and U- can be calculated using Uofs as written in the datasheet.
OUT+ is 0.8V~1.8V, OUT- is 2*Uofs-OUT+. So you can only change the OUT- level, not the OUT+ level.