The Clerk of the House stated the results of the House action: “Ordered, that the House of Representatives rejects the objection to the electoral vote of the State of North Carolina submitted by the Representative from Michigan, Mr. O’Hara, and the Senator from Maine, Mr. Muskie.” Congressional Record, vol. 115 (January 6, 1969), p. 171. The House vote was 170-228. See also Deschler’s Precedents, vol. 3, chap. 10, §3.6. Both houses used roll call votes to decide the question.
A footnote indicates it's a roll call vote.
the link is https://crsreports.congress.gov/product/pdf/RL/RL32717/12