Travelers wanting a hard copy or other evidence of admission will be directed to www.cbp.gov/I94 to print a copy of an I-94 card based on the electronically submitted data, including the I-94 number from the form, to provide as necessary to benefits providers or as evidence of lawful admission.

The website requires you to enter your biographic and entry information (first name, last name, date of birth, passport number, date of entry and class of admission) to retrieve your electronic I-94 card. You can then print it out and use the print-out to present to other benefit-granting agencies.
CBP should provide travelers with a handout which explains how to print out the I-94. The handout is available in 12 languages.