He walked in the ways of Asa, his father; he did not turn away from them

"He did things that were pleasing to Yahweh, like his father Asa had done, and he did not stop doing those things"

he did what was right in the eyes of Yahweh

"he did what Yahweh judged to be right" or "he did what Yahweh considered to be right". See 2 Chronicles 14:2.