If you would like evaluators on your Assessment to see only the scores that they provide to their entries (and not see any scores provided by you or other evaluators) you can give them Limited View in the Tools feature of a rubric Assignment.
Below is an example of what evaluators with a limited view will see. Scores from other evaluators are hidden from view, as is the aggregate score for the overall assessment. It is important to note that evaluators with a limited view are not able to manually choose a score for a rubric that is set for manual selection. Only the owner of the assessment or evaluators that do not have a limited view may manually select a score from multiple evaluations.