c) extract it - this should created local-repo folder. So, you will get /tmp/zeppelin/local-repo with all the subfolders in it
d) copy the content of /tmp/zeppelin/local-repo into /usr/hdp/current/zeppelin-server/local-repo
e) change the owner of local-repo and all its folders/file to zeppelin:hadoop (or zeppelin:hdfs <- whatever the GROUP you have)
f) change the permissions local-repo and all its folders/file to 755
g) restart Zeppelin service
NOTE: step a) is something you can do yourself. Just install the environment on a temporary machine with internet access and get the content of /usr/hdp/current/zeppelin-server/local-repo from there.