Since triangles \( \triangle ABC \) and \( \triangle CDA \) are congruent (\( \triangle ABC \cong \triangle CDA \)), it follows that the corresponding sides of the triangles are equal.
Given:
- \( \overline{CA} = 84 \)
- \( \overline{BC} = 85 \)
From the congruence of the triangles, we have:
- \( \overline{AD} = \overline{BC} = 85 \)
- \( \overline{CD} = \overline{CA} = 84 \)
So, we can fill in the following information:
- \( \overline{AD} = 85 \)
- \( \overline{CD} = 84 \)