Answer
Please see the work below.
Work Step by Step
We know that if the reaction is reversed then the new value of $K_c^{\prime}$ will be the reciprocal of $K_c$ that is
$K_c^{\prime}=\frac{1}{K_c}=\frac{1}{1.84}=0.543$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.