Final answer:
The proofreaders' symbol used to indicate that text should be moved to the right is the right arrow, denoted by the symbol ].
Step-by-step explanation:
The proofreaders' symbol that means "move text to the right" is the right arrow, which is represented by the symbol ]. When a proofreader wishes to indicate that a portion of text should be indented or moved to the right, they would place this symbol in the text or on the margin. It's important to note that different symbols can be used in various editing environments, but in a general context, the right arrow ] is recognized for this action.