I am in the process of knitting the Manheim Fitted pullover and have made my 1st decrease. It now states knit 5 rows evenly. What does that mean? I “think” it means knit 5 right side/wrong side rows. Am I correct?

Correct. Knit even means to continue with no increases or decreases so you’ll work a total of 5 rows, RS and WS.

Yes, just knit the next 5 rows without any shaping, no decreases.