Add hostname to email subject line of splunk alert

[searching]

Trying to edit the email subject line of alerts I am receiving.

I have tried adding host=$host$ to the base search and in the subject line and was unsuccessful.

I have tried using the $result. host$ macro and was unsuccessful as well.  

search looks like :

| stats latest(cpu_load_percent) AS "CPU Utilization" by host _time

| where 'CPU Utilization' >= 95

|dedup host

[_JP]

This post covers this topic:

Solved: How to implement tokens in Email alert? - Splunk Community

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Still a little confused. I have tried both the $host and $name token and neither work. My search sends an alert when any host reach a certain level of CPU utilization. At times there are multiple host that show in the search. when adding the token in the subject line it appears in the email sent as $host or $name. An email is triggered for each host but the goal is to have the host name and value in the subject line.